ICO to PNG
ICO: ICO is an image file format that can contain image icons. ICO is used in Microsoft Windows Operating systems to contain the icon files. It typically contains bitmap images. Also, ICO files are used on websites as favicons. It supports 24-bit color images.
PNG: PNG or Portable Network Graphic format is a graphic file format that uses a lossless compression algorithm to store raster images. It uses 2 stage compression methods. It is frequently used as web site images rather than printing as it supports only the RGB color model. So CMYK color images cannot be saved as PNG images.